Computing in arithmetic groups with Voronoï's algorithm☆
Computing in arithmetic groups with Voronoï's algorithm☆
复制标题
使用 Vorono 算法进行算术组计算
DOI:
10.1016/j.jalgebra.2015.01.022
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发表时间:
2015
影响因子:
0.9
通讯作者:
Sebastian
中科院分区:
文献类型:
--
作者:
Oliver;R. Coulangeon;G. Nebe;Schönnenbeck;Sebastian
We describe an algorithm, meant to be very general, to compute a presentation of the group of units of an order in a (semi-) simple algebra over Q. Our method is based on a generalisation of Voronoï's algorithm for computing perfect forms, combined with Bass–Serre theory. It differs essentially from previously known methods to deal with such questions, eg for units in quaternion algebras. We illustrate this new algorithm by a series of examples where the computations are carried out completely.
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